Coherent Multimode OAM Superpositions for Multidimensional Modulation

Anguita, Jaime A.; Herreros, Joaquin; Djordjević, Ivan B.

doi:10.1109/jphot.2014.2309645

Cited by 83 publications

(39 citation statements)

References 21 publications

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“…LG o p, (x, y, z) = (−i) m+1 IG o 2p+ , ( x, y, z| → 0) , (18) where the even and odd LG modes, LG e p, and LG o p, , are defined by replacing the Hilbert phase term exp (i ϕ) in normalized LG modes with cos ( ϕ) and sin ( ϕ) respectively [31].…”

Section: Eigen Mode Output In Laser Resonatorsmentioning

confidence: 99%

Hybrid topological evolution of multi-singularity vortex beams: generalized nature for helical-Ince–Gaussian and Hermite–Laguerre–Gaussian modes

Shen

Meng

et al. 2019

J. Opt. Soc. Am. A

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A generalized family of scalar structured Gaussian modes including helical-Ince-Gaussian (HIG) and Hermite-Laguerre-Gaussian (HLG) beams is presented with physical insight upon a hybrid topological evolution nature of multi-singularity vortex beams carrying orbital angular momentum (OAM). Considering the physical origins of intrinsic coordinates aberration and the Gouy phase shift, a closed-form expression is derived to characterize the general modes in astigmatic optical systems. Moreover, a graphical representation, Singularities Hybrid Evolution Nature (SHEN) sphere, is proposed to visualize the topological evolution of the multi-singularity beams, accommodating HLG, HIG and other typical subfamilies as characteristic curves on the sphere surface. The salient properties of SHEN sphere for describing the precise singularities splitting phenomena, exotic structured light fields, and Gouy phase shift are illustrated with adequate experimental verifications.

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Section: Eigen Mode Output In Laser Resonatorsmentioning

confidence: 99%

Hybrid topological evolution of multi-singularity vortex beams: generalized nature for helical-Ince–Gaussian and Hermite–Laguerre–Gaussian modes

Shen

Meng

et al. 2019

J. Opt. Soc. Am. A

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“…Constellations may also be generated using generic numerical optimization over some cost function, for example maximizing the minimum Euclidean distance between constellation points [12]. While these constellations offer more flexibility in terms of signal dimensionality than simple geometric designs, the labeling problem is not eliminated, and numerical optimization may not produce good results if the cost surface is not convex.…”

Section: Numerical Optimizationmentioning

confidence: 99%

“…While signaling in many dimensions was proposed previously in the wireless literature [9], it has recently become a topic of interest in the optical fiber communications community. Constellations have been proposed with many dimensions, utilizing wavelength [10], time-slots [11], or orthogonal optical fields [12] in order to find a basis of the required number of dimensions to represent the signal.…”

Section: Introductionmentioning

confidence: 99%

High-Dimensional Modulation for Optical Fiber Communications

Millar

Koike‐Akino

2014

Asia Communications and Photonics Conference 2014

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Recent research has indicated that increasing modulation format dimensionality may provide a gain in performance over traditional 1-D, 2-D and 4-D formats. In this paper, we will discuss the principles behind high-dimensional modulation, and examine several approaches to constellation design in many dimensions. Asia Communications and Photonics Conference (ACP) 2014This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. Abstract: Recent research has indicated that increasing modulation format dimensionality may provide a gain in performance over traditional 1-D, 2-D and 4-D formats. In this paper, we will discuss the principles behind high-dimensional modulation, and examine several approaches to constellation design in many dimensions.

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“…Superimposed OAM modes of multiple vortex beams possess more peculiar distribution structures and more controllable parameters for their potential applications in microparticle manipulation [11] and optical information encoding [12] compared with the conventional single-OAM mode. The superimposed OAM mode of multiple Laguerre-Gaussian (LG) beams have been studied in depth because of their simplicity of generation [12,13] . Classical information encoded by the superimposed OAM mode has recently started to be tested in real scenarios over a 3 km-long distance with significant turbulence, and showed that the phase of the superimposed OAM mode could be well conserved during the transmission in the turbulent atmosphere [12] .…”

mentioning

confidence: 99%

“…A low-density parity check-coded modulation architecture using coherent superimposed OAM mode for an optimal signal constellation was proposed in Ref. [13]. Recently, nondiffraction vortex beams [14][15][16][17] were widely adopted as the beam sources to mitigate the turbulence effect and proved to be superior to classical LG beams.…”

mentioning

confidence: 99%

Superimposed orbital angular momentum mode of multiple Hankel–Bessel beam propagation in anisotropic non-Kolmogorov turbulence

Tong

Cheng

et al. 2016

中国光学快报

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Mathematical models for the superimposed orbital angular momentum (OAM) mode of multiple Hankel-Bessel (HB) beams in anisotropic non-Kolmogorov turbulence are developed. The effects of anisotropic turbulence and source parameters on the mode detection spectrum of the superimposed OAM mode are analyzed. Anisotropic characteristics of the turbulence in the free atmosphere can enhance the performance of OAM-based communication. The HB beam is a good source for mitigating the turbulence effects due to its nondiffraction and self-focusing properties. Turbulence effects on the superimposed OAM mode can be effectively reduced by the appropriate allocation of OAM modes at the transmitter based on the reciprocal features of the mode cross talk.OCIS Light can carry both spin angular momentum (SAM) and orbital angular momentum (OAM), where SAM is associated with polarization and OAM is related to the spatial profile of the intensity and phase [1] . The SAM with two orthogonal modes is well known and widely exploited in present free-space optical (FSO) systems to double the channel capacity [2] . Recently, there has been a growing interest in utilizing advanced OAM modes of light to enhance the channel capacity and spectral efficiency in FSO links [3] . OAM-based FSO systems have been employed to demonstrate high-capacity information transmission with a link distance of ∼1 m at the lab scale [4] . OAM modes are inevitably sensitive to turbulence interference in the atmosphere because of their natural spatial structure [5] . The ability to transmit OAM modes over long-distance free space is crucial in order to take such lab-scale experiments into the real world [6] . Several investigations [5][6][7][8][9][10] have revealed that the effective range of the transmitted OAM modes with a small ratio of the mode cross talk in the atmosphere were restricted to a relatively narrow range because of turbulence effects. Turbulence-induced scintillation significantly caused the cross talk among OAM modes [7] , reduced information capacity [8] , and induced the spread of the OAM mode detection spectrum [9,10] . Superimposed OAM modes of multiple vortex beams possess more peculiar distribution structures and more controllable parameters for their potential applications in microparticle manipulation [11] and optical information encoding [12] compared with the conventional single-OAM mode. The superimposed OAM mode of multiple Laguerre-Gaussian (LG) beams have been studied in depth because of their simplicity of generation [12,13] . Classical information encoded by the superimposed OAM mode has recently started to be tested in real scenarios over a 3 km-long distance with significant turbulence, and showed that the phase of the superimposed OAM mode could be well conserved during the transmission in the turbulent atmosphere [12] . A low-density parity check-coded modulation architecture using coherent superimposed OAM mode for an optimal signal constellation was proposed in Ref. [13]. Recently, nondiffraction vortex beams [14][15][16][17] w...

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Coherent Multimode OAM Superpositions for Multidimensional Modulation

Cited by 83 publications

References 21 publications

Hybrid topological evolution of multi-singularity vortex beams: generalized nature for helical-Ince–Gaussian and Hermite–Laguerre–Gaussian modes

Hybrid topological evolution of multi-singularity vortex beams: generalized nature for helical-Ince–Gaussian and Hermite–Laguerre–Gaussian modes

High-Dimensional Modulation for Optical Fiber Communications

Superimposed orbital angular momentum mode of multiple Hankel–Bessel beam propagation in anisotropic non-Kolmogorov turbulence

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